Automixer

An automixer, or automatic microphone mixer, is a live sound mixing device that automatically reduces the strength of a microphone's audio signal when it is not being used.

Automixers reduce extraneous noise picked up and comb filtering effects when several microphones operate simultaneously. Automixers uses a variety of methods that allow increased gain before feedback for live sound reinforcement.

Automixers are typically used to mix panel discussions on television talk shows and at conferences and seminars. They can also be used to mix actors' wireless microphones in theater productions and musicals. Automixers are frequently employed in settings where it is expected that a live sound operator won't be present, such as courtrooms and city council chambers.